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t e e h S s t e m m 9N E R O O M E C m a 0 M 0 m CONTROLLING DEVICE FOR ELEVATORS.

P tented Aug. 1,1893.

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O. E. MOORE. CONTROLLING DEVICE FOR ELEVATORS.

No. 502,372. Patented Aug. 1, 18913;

Uiariaal). fizz/ore UNITED STATES PATENT OFFICE.

CHARLES Moons, on BOSTON, MASSACHUSETTS, nssrcson TO THE MOORE'ZQ WYMAN ELEVATOR AND mncinsswonxs, OF SAME PLACE.

CONTROLLING DEV ICE FOR ELEVATORS.

smcmca'non' forming part of Letters 2mm No. 502,372, dated August 1, lsoe'.

Application filed April 10,1893

-To' all whom it may concern: Be it known that I, CHARLESE. Moons, a citizen of the United States esidingatBoston, in the county of Suffolk and State of Massachusetts,have invented certain Improvements in Controlling Devices for Elevators, of which the following is a fnll,clear, and exact description, reference being bad to the accompanying drawings, lnakin which.

Figure 1 is .a side view of ator constructed in accordance with my invention,'thc reversing and operating valves: Fig. 2 is a view, partly in section,-ot the'valves and thejz opbeing shown in section.

cratingn echanisin, showing t-hepositions of ,the parts when the elevator car is stopped in its ascent;- Fig.3 is a sectional detail, showing the position ofthe reversing valve when so moved to permit the elevator car to descend.

Fig. 4 is a .view representing a modification of my invention to be hereinafter referred to.-

stop the car gradually, thus avoiding any sud-'- My invc'ntion' relates to elevator controllin mecl|anisn1 ,and has forits object to start an den shock or jar, and also to'stop the car automstically with its floor-exactly opposite'to or even with theseverallandings, which cannot be accomplished w h any degree of :ccrtainty'when dependent on the judgment of the operator.

To this end my invention consists in an elevator controlling mechanism comprising a. detent or pawl adapted to be operated by means located within the car, and connected with the starting and sto pingmechanism, a of trsvelingstopksfor projections, actuated by tho elevator-motor and adapted to engage said dete'nt and thereby actuate the mechanism connected therewith to stop the cer and a. weight connected-with said start-.

ing and stopping mechanism and said detent, and adapted to be'raisedwhen said detent is -actuated byone of. said stopehlocks to stop 4 5 t 0 car, and descend to operate the mechanism whereby the car is set ininotion when said de'tent is thrown out of engagement with said stop block by the operator inthe car, as hereinafter more particularly set forth.

5o In the said drawings A' represents the gpart of this specification, ini

a hydr aulic ele,

. Burial to. 469.812. on ith cylinder of a. hydraulic elevator, and B the cross head which carries the hoisting'rope wheels 0. v v

' D represents the stationary hoisting-rope wheels and E the hoisting-rope, which passes overthe wheels C, D, and up the hoistway over a wheel F, and is secured at 10 to the elevatoncar G.

H is the cross-head-guide, and I, I, are legs for supporting thecylinderA; all of the parts thus far-described being common to all hydraulic elevators of this class, and forming no part of my invention.

J is a rope passing through the carG over a wheel K at the' top of the hoistway and down outside the car to and around a whoel L to which it is fastened, said wheel L being secured to a crank-shaft M. provided with a crank a, to which is pivoted one endof a connecting rod b, the opposite end of which is: pivoted to the reversing-valve N, consisting of two heads- 15'connectedbya rod and adapted to reciprocate within .a casing 16, to which is connected the inlet pipe d through which-the water under pressure is supplied to thecylin'der A to operate the elevator.

e is the. discharge pipe, throughwhich thewater escapes from the cylinder A-when the car is descending, and fis a port leading from the valve casing 16 into the casing'17 of the operating-valve P which consists of-two heads 18 secured-open a valve rod 19, and adapted to controls. port 9 throughwhich the water passes directly into the'cyli'nder Q is a horizontal bar secured at oneicnd to the cross-head B and supported and guided -bya bracket h. To this barQare adjustably secured-by means of set screws 0, a series of stop-blocks or projections l, 2, 3, 4,-corresponding respectively to the several floors or landings' at which-the elevator-car is to stop, said blocks traveling backward and forward in-a horizontal plane with the bar Q as the latter. is reciprocated with the cross-head B when the elevator-car is ascending and descending. 5

R is a detent or pawl which. is adapted. to be engaged by either one of the stop-blocks 0t thejbai-Q'when' it is desired to stop the'elevator at the flooror landing correspondingto the particular stop-block whisky detent. Thisdetent R is operated from within the carG to bring it intoengagement with any particular stop-block desired by means of a lever S fulerumed at 20 and having se- 5 cured to its horizontal arm 21 a ropeT which passes down around a wheel 7 and thence up outside the car over, a wheel U at the top of the hoistway,and down to the top of the car to which it is secured at The rope-wheel V runs loosely on a stud '22 at one end of a boil crashlever fnlorumed at 23, on a studprojecting from one of the walls of the hoistway or other adjacent stationary part and to the otherend of this bellcrank is pivoted a rod Y connected at 24 .to one end of a bell-crank z' fulcrumed at 25, on a stud projecting from an adjacent stationary part, and to the other end of this bell crank '11 is pivoted at 26 a rod 27, the lower end of which is pivoted at 28 to the detent R, the latter being pivoted at 29 to the upper endot a lever k trade in theform of a cross, and fulcrumed on a stud 30 projecting from the cross-head I-I. To the lower end of this lever 25 k is pivoted at 31a rod 32, theopposite end of which is pivoted at 33 to the valve-rod 19 of the operating valve P, by which the supply of water is admitted to and shut off from the cylinder A. \Vith this construction when 0 the'iever S in the car is moved into the position indicated by the dotted lines, the detent R will be lowered into a position to be e 1- gaged bythe next cording to the direction in which the bar Q is traveling, thus causing the cross-lever k to be swung over to theright or left hand asthe case may be, to shut o the water from the cylinder A and stop the ear, and when said lever S is thrown back into the position shown 40 in full lines, the detent R will be raised as shown in Fig. 1, out of the path of. the trav-' cling stop-blocks which are then'free to move without actuating the lever l is a weight adjstable on a. lever m fulcrumed at 2L to the cross-head guide H, and to this lever are pivoted two rods q, r, slotted for the reception of pins 35 by which they are connected to the lateral arms 36, 37, of the cross lever k, whereby when the latter is swung 5:: over to one side or the other by the contact of one of the traveling stop-blocks with the detent R, the weight Z will be raised as shown in Fig. 2,and when said detent is elevated out of engagement with a stop-block, the weight will descend to move the lever is into the position shown in Fig. 1, thus opening the valve P to start the elevator-car up or down as the case may be.

The time occupied by the weightl in descending to open the operati'ngyalve I is regulated by a suitable retarding device, which consists, in the present case, of a pipe t provided with a regulating cock '10, said pipe cont municatingwith both ends of the casing of the valve P, whereby the water is caused to pass from one end of the casing to the other, according to the direction in which the valve advancing stop-bloek, -ao-'- is moving, the movement of the water through the pipe t being regulated by the cock w, whereby the valve is caused to move slowly to start the car gradually, and thus avoid any sudden shock or jar. I

The operation of the above described mechanism is as folluws:'l-he parts being in the position represented in Fig. 1, with the ele- '75 vator car ascending, and said car going passed the second landing, if ibskoqld R46 mo es helmet-S in thee t shown in dated has, which will lower the wheel V and permit the detent it to drop onto the bar Q,which is at that time moving in the direction of the arrow. The stop-block 3 will. now engage the detent R and swing the lever it over intothe position shown in Fig. 2, which causes the port f to be closed, thus shutting off the water from the cylinder and automatically stopping the car, the stop-blocks 1,2, 3,v 4, being so arranged or adjusted on the bar Q as to cause the port f to be closed atthe 9o instant that the floor of the car is even. with a landing, and consequently it is impossible for the car to stop either above or below the same, which is an important advantage, as much time is frequently lost in making a 5 trip by the necessity of starting and stopping the elevator to bring the car even with the landing when not originally stopped at the proper level. The closing of the port f by the means described when-the-ear isms-Nico.

cending, will cause the weight Z to be raised into the position shown in Fig. 2. To continue the ascent of the car'the operator moves the lever S back to the position shown in full lines in Fig. 1, which raises the detent R, and disengages it from'the stop-block 3, when the weight '1 will instantly descend by its own gravity, and, through the connections described, open the portf and ad mitthe water to the cylinder A through the pipe d and the portsf and g, as shown in Fig. 1. The car will now ascend, and by moving the lever S back to the position shown dotted, the detent R will be dropped into position to be engaged by the stop-block 4, whereby the car will be stopped even with the fourth floor or landing in the same manner as described for t to landingsv below. It will beobvious that the lever Scan be thrown over to stop the car at the next landing, immediately after it starts from the previous landing, or at any time sudiciently soon to insure the engagement-of the next stop-block with the letent R before the car-reaches the landing at which it is desired to stop. While the car is ascending, the reversing valve N remains open as shown in Fig. 1, only the operating-valve P being used to stop and start the elevatorat the several landings. When the car is to do by means of the rope J and its connections into a position to shut otf communication between the inlet or supply pipe d and the-pert and at the same time bring said portfinto scend, the reversing valve N must be moved 1 0' communication with the discharge pipe 2, as

' lto be raised by the rod r,

shown in Fig.3, the operating-valve P remaining closed and preventing the escape of the water from the cylinder through the ports g andf. The operator next moves the lever S back into the position shown in full lines in Fig. 1, which lifts the detent R and re leases the weight I, which then descends and moves the valve P to. open the ports f, When the water will escape from the cylinder through the discharge pipe 9 and permit the car to descend, the car being stopped at the several landings in the same manner as in its ascent. The movement of the barQ when thecar is descendingisina direction opposite to that previously described, and the valve P will also be moved in the opposite direc tion to stop the elevator, causing the weight as the cross-lever is will then be swung over into a position opposite to that shown in Fig. :2. It will be seen that the operating-valve is opened to start the elevator by the descent of the weight I,

- and closed to stop the elevator by the movement of the stop-bar Q acting through the detent R; it being merely necessary for the operator to raise or lower the detent R by meansof the leverSas he may wish to start or stop the car, and as the operator has no conol of the time at which the operating-valve .s opened or closed, it is impossible to start with a sudden jerk or shock or step above or below the landings.

In Fig. 4 is represented a modification of my invention which represents it as applied to an elevator provided with a hoisting drum which maybe rotated byclectricity, steam, or other suitable power. v In this figure A represents the bed-plate of the elevator; 13' is the hoisting drum, and E the hoisting rope, which is secured to the car G in the usual manner. I) is the operating shaft connected with the starting and stopping mechanism by which the power is applied or shut off. This shaft D is provided with a pinion 50 with which meshes a. rack bar 6' adapted to turn the pinion and shaft a half revolution in either direction to start or stop the elevator. The rack bar C is pivoted to the arm 52 of the lever 10 fulcrumed on a stud 51 and having pivoted to its arm 53 a detent R similar to that shown in the other figures, and adapted to be operated by similar means located within the car. This detent, when permitted to descend, is adapted to be engaged by either one of a series of traveling stop-blocks or projections 1, 2, 3, 4, which, instead of being placed on a horizontally reciprocating bar, as first described, are arranged around the periphery of a flange 54 on a gearll', which is mounted an the stud 51, and is adapted to be rotated by a pinion I on the shaft of the hoisting drum B. The lateral arms 36, 37 of the lever 1: are connected by slotted rods q, r, with the lever m, carrying the weight I, which opcrates in the manner previously described when the detent is raised, causing the lever in this case to operate the rack bar (1' to start the elevator, instead of operating a valve as in the construction bar (1' being moved in the opposite direction to stop the elevator by the stop-blocks on the gear tent R when the latter is permitted to descend by moving the lever S in the car. \Vith this construction a dash-pot or retarding device would in practice be applied to the weighted lever m to case it in its descent and prevent a too sudden application of the power in starting the elevator.

The pinion I and gear II' are properly profirst described, the rackthe contact of one of,

ll with the de-' portiorred to cause the latter to make a single revolution while the car is ascending or descending, which admits of the stop-blocks being so arranged as to stop the car even with the several landings as required.

The reversing rope J is shown as connected with the current reverser L of an electric motor, but when the elevator is adapted to be driven by steam or other power it would be connected with a belt-shipper or other device for reversing the direction of motion of the machine or motor in a well known manner.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. An elevator controlling mechanism, com prising a detent, means located within the car for operating said detent, starting and stopping mechanism connected with said detent, a series of traveling stop-blocks or projections actuated by the elevator-motor and adapted to engage said detent and thereby actuate the mechanism connected therewith to stop the car, and a weightconnected with said starting and stopping mechanism and said detent, and adapted to be raised when said detent is actuated by one of said stop blocks to stop the car, and descend to operate the mechanism whereby the car is set in motion when said detent is thrown out of engagement with said stop-block, substantially as set forth.

2. In an elevator controlling device, the combination, with acar and its hoisting mechanism, of a detent, means located within the car for operating said detent, aleverto which said detent is pivoted, starting and stopping mechanism connected with said lever, a scries of traveling stop-blocks or projections actuated by the elevator motor and adapted to engage said detent and thereby move the lever connected therewith to stop the car, and a weight connected with said lever and adapt ed to move the same to start the car when the detent is released from its engagement with a stop-block, substantially as described.

3. In a hydraulic elevator, the combination, with the car and its hoisting mechanism, of a detent, means located within the car for operating saitLdetent, a lever to which said detentis pivoted,an operating valve connected with said lever, a reciprocating bar connected with and actuated by the hoisting mechanism and provided with a series of stop too blocks or projections adapted to engage said dctent and thereby move the lover connected with the operating valve to stop the car, and a weight con nccted with said lever and adapt ed to move the operating valve connected therewith to start the car when said detent is disengaged from a stop-block, substantially as described.

i. In a hydraulic elevator, the combination,with the car, and its hoisting mechanism, of a t1etent,1ncans located within the can for operating said detent, a lever to which said detcnt is pivoted, an operating valve connected with said lover, a reciprocating bar connected with and actuated by the hoisting mechanism and provided with a. series of stop-blocks or projections adapted to engage said detent and thereby move the l ,vcr connected with the operating-valve I0 stop the car, a Weight connecietl with said lever and adapted to move the operating-valve connected therewith to start the car when said dctont is-disengagcd from the stop-block bar, and a reversing valve adapted to be operated by means located within the car, all operating substantially as set forth.

In a hydraulic elevator, the combinat.ion,with the cat; and its hoisting mechanism, of a detent, means located within the car for operating said dctcnt, a lever to which said detent is pivoted, an operating valve conncctcd with said lover, a reciprocating bar connected with and actuated by the hoisting mechanism and provided with a series of stophlocks or projections adapted to engage said detent and thereby move the lover connected with the operating valve to stop the car, a weight connected with. said lever and adapted to move the operating valve connected therewith to start the car when said detent is dis engaged from the stop-block bar, a reversing valve adapted to be operated by means locatcd within the car, and n retarding-device connected with'tho operating-valve mocha! ism, whereby the descent of the w'ci the movement of the operating-volt toinatically controlled to effect the grade application of the power in starting the t substantially as set forth. v

6. In an elevator, the combinatiomwith the elevator car and its hoisting mechanism, oi the detent R, moans located within the car for operating said detect, the lever 14M]! and stopping mechanism connec cdwim lever, the latter having the detent. R ivid thereto and provided with the lat 36, 37, the lever m with its weight 1, theblott-eti rods q, 7', connected with the arms 38, $7, of the lever L3, and a series of t blocks adapted to move in oppo m directinne and engage the detent R to mom and stop the car in its ascent Oixijlt evi, Sui?- stantially as set forth.

7. In an elevator, the combination mit elevator car, of the cylinder A, then end B, the hoisting-rope E, rope wheels U, i), h 5 reciprocating bar Q, secured to the ores L l3 and provided with a series of stops or projections corresponding to the several landings, the detent it means locate-ii Wlilili] the car for operating said (latent, the lever A:

having the detent R pivoted thereto and pro vided with arms 36, 37, the lever 'ifl with its weight i, the slotted rods q, 7', connected with the arms of the lever 10, the operating veive P connected to the lover I; by the rod 19, the reversing valve N and means located within the our to operate the same, and a retarding device for the operating-valve all constructed to operate substantially as set forth.

Witness my hand this 8th day ofcApril, A. D. 1893.

CHARLES E. MOORE. In presence of I. TESCHEMACHER, R. HENRY MARSH. 

